Escaliers illusions

contains_block=false,facing=east,half=bottom,shape=inner_left contains_block=false,facing=east,half=bottom,shape=inner_right contains_block=false,facing=east,half=bottom,shape=outer_left contains_block=false,facing=east,half=bottom,shape=outer_right contains_block=false,facing=east,half=bottom,shape=straight contains_block=false,facing=east,half=top,shape=inner_left contains_block=false,facing=east,half=top,shape=inner_right contains_block=false,facing=east,half=top,shape=outer_left contains_block=false,facing=east,half=top,shape=outer_right contains_block=false,facing=east,half=top,shape=straight contains_block=false,facing=north,half=bottom,shape=inner_left contains_block=false,facing=north,half=bottom,shape=inner_right contains_block=false,facing=north,half=bottom,shape=outer_left contains_block=false,facing=north,half=bottom,shape=outer_right contains_block=false,facing=north,half=bottom,shape=straight contains_block=false,facing=north,half=top,shape=inner_left contains_block=false,facing=north,half=top,shape=inner_right contains_block=false,facing=north,half=top,shape=outer_left contains_block=false,facing=north,half=top,shape=outer_right contains_block=false,facing=north,half=top,shape=straight contains_block=false,facing=south,half=bottom,shape=inner_left contains_block=false,facing=south,half=bottom,shape=inner_right contains_block=false,facing=south,half=bottom,shape=outer_left contains_block=false,facing=south,half=bottom,shape=outer_right contains_block=false,facing=south,half=bottom,shape=straight contains_block=false,facing=south,half=top,shape=inner_left contains_block=false,facing=south,half=top,shape=inner_right contains_block=false,facing=south,half=top,shape=outer_left contains_block=false,facing=south,half=top,shape=outer_right contains_block=false,facing=south,half=top,shape=straight contains_block=false,facing=west,half=bottom,shape=inner_left contains_block=false,facing=west,half=bottom,shape=inner_right contains_block=false,facing=west,half=bottom,shape=outer_left contains_block=false,facing=west,half=bottom,shape=outer_right contains_block=false,facing=west,half=bottom,shape=straight contains_block=false,facing=west,half=top,shape=inner_left contains_block=false,facing=west,half=top,shape=inner_right contains_block=false,facing=west,half=top,shape=outer_left contains_block=false,facing=west,half=top,shape=outer_right contains_block=false,facing=west,half=top,shape=straight contains_block=true